/**********************************************************************
** Copyright (C) 2000-2005 Trolltech AS.  All rights reserved.
**
** This file is part of the Qtopia Environment.
** 
** This program is free software; you can redistribute it and/or modify it
** under the terms of the GNU General Public License as published by the
** Free Software Foundation; either version 2 of the License, or (at your
** option) any later version.
** 
** A copy of the GNU GPL license version 2 is included in this package as 
** LICENSE.GPL.
**
** This program is distributed in the hope that it will be useful, but
** WITHOUT ANY WARRANTY; without even the implied warranty of
** MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. 
** See the GNU General Public License for more details.
**
** In addition, as a special exception Trolltech gives permission to link
** the code of this program with Qtopia applications copyrighted, developed
** and distributed by Trolltech under the terms of the Qtopia Personal Use
** License Agreement. You must comply with the GNU General Public License
** in all respects for all of the code used other than the applications
** licensed under the Qtopia Personal Use License Agreement. If you modify
** this file, you may extend this exception to your version of the file,
** but you are not obligated to do so. If you do not wish to do so, delete
** this exception statement from your version.
** 
** See http://www.trolltech.com/gpl/ for GPL licensing information.
**
** Contact info@trolltech.com if any conditions of this licensing are
** not clear to you.
**
**********************************************************************/

#ifndef QTHREADSTORAGE_H
#define QTHREADSTORAGE_H

#ifdef QT_THREAD_SUPPORT

#include "qglobal.h"

class Q_EXPORT QThreadStorageData
{
public:
    QThreadStorageData( void (*func)(void *) );
    ~QThreadStorageData();

    void** get() const;
    void** set( void* p );

    static void finish( void** );
    int id;
};


template <class T>
class QThreadStorage
{
private:
    QThreadStorageData d;

#if defined(Q_DISABLE_COPY)
    // disable copy constructor and operator=
    QThreadStorage( const QThreadStorage & );
    QThreadStorage &operator=( const QThreadStorage & );
#endif // Q_DISABLE_COPY

    static void deleteData( void *x ) { delete (T)x; }

public:
    inline QThreadStorage() : d( deleteData ) {  }
    inline ~QThreadStorage() { }

    inline bool hasLocalData() const
    { return d.get() != 0; }

    inline T& localData()
    { void **v = d.get(); if ( !v ) v = d.set( 0 ); return *(T*)v; }

    inline const T localData() const
    { void **v = d.get(); return ( v ? *(T*)v : 0 ); }

    inline void setLocalData( T t )
    { (void) d.set( t ); }
};

#endif // QT_THREAD_SUPPORT

#endif // QTHREADSTORAGE_H
